212446341556 has 6 divisors (see below), whose sum is σ = 371781097730. Its totient is φ = 106223170776.

The previous prime is 212446341539. The next prime is 212446341617. The reversal of 212446341556 is 655143644212.

It can be written as a sum of positive squares in only one way, i.e., 205227120400 + 7219221156 = 453020^2 + 84966^2 .

It is a super-2 number, since 2×212446341556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26555792691 + ... + 26555792698.

Almost surely, 2^212446341556 is an apocalyptic number.

It is an amenable number.

212446341556 is a deficient number, since it is larger than the sum of its proper divisors (159334756174).

212446341556 is a wasteful number, since it uses less digits than its factorization.

212446341556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53111585393 (or 53111585391 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

Adding to 212446341556 its reverse (655143644212), we get a palindrome (867589985768).

The spelling of 212446341556 in words is "two hundred twelve billion, four hundred forty-six million, three hundred forty-one thousand, five hundred fifty-six".